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Title:
LOW-CTE, LOW-PUFFING NEEDLE COKE
Document Type and Number:
WIPO Patent Application WO/2021/054122
Kind Code:
A1
Abstract:
The purpose of the present invention is to more stably obtain low-CTE, low-puffing needle coke while responding to changes in the properties of the crude oil feedstock. This low-CTE, low-puffing needle coke is characterized by mixing and coking secondary crude oil feedstock that has strong hydrogen donor properties and a 5.0 or higher PDQI value, indicated in fig. (1), with needle coke main crude oil feedstock of coal tar heavy oil or petroleum-based heavy oil that has weak hydrogen donor properties and a less-than-5.0 PDQI value, indicated in fig. (1), and calcining the thusly obtained raw coke. [Formula (1)] PDQI = H% × 10 × (HNβ/H) Here, H% is the amount of hydrogen (wt%) obtained by elemental analysis, and HNβ/H is the ratio of β-naphthenic hydrogen and total hydrogen measured by 1H-NMR).

Inventors:
HADA KYOHEI (JP)
Application Number:
PCT/JP2020/033267
Publication Date:
March 25, 2021
Filing Date:
September 02, 2020
Export Citation:
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Assignee:
NIPPON STEEL CHEMICAL & MAT CO LTD (JP)
International Classes:
C10B57/04; C01B32/05
Domestic Patent References:
WO2009001610A12008-12-31
WO2019188280A12019-10-03
Foreign References:
JP2017019915A2017-01-26
JPH051288A1993-01-08
JPH05239466A1993-09-17
US4490244A1984-12-25
JPS60149690A1985-08-07
JPH04145193A1992-05-19
JPS5229801A1977-03-07
JPS6121886A1986-01-30
JPH05163491A1993-06-29
Other References:
CARBON, vol. 19, no. 5, pages 347 - 352
JOURNAL OF THE FUEL SOCIETY OF JAPAN, vol. 65, no. 12, 1986, pages 1012 - 1019
See also references of EP 4032962A4
Attorney, Agent or Firm:
SASAKI Kazuya et al. (JP)
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